Two electric bulbs , rated for the same voltage , have powers of `200 W and 100 W`, respectively. If their resistances are `r_(1) and r_(2)` , respectively , then

Two electric lamps ,each of powers 60 W , have voltage ratings of 220 V and 110 V respectively . Find the ration of their resistances .

Two electric bulbs A and B are rated 60 and 100 W , respectively. If they are connected in parallel to the same source , then

Two electric bulbs A and B are rated 60 and 100 W , respectively. If they are connected in parallel to the same source , then

Two bulbs are rated 60 W, 220 V' and '60 W, 110 V respectively. Calculate the ratio of their resistances.

Assertion (A): When two bulbs are operated on same voltage supply, having power 60 W and 100 W then 100 W bulb has less resistance than 60 W. Reason (R): The power of the bulb is directly proportional to the square of the voltage.

Two bulbs are having the ratings as 60 W, 220 V and 40 W, 220 V respectively. Which one has a greater resistance?

Two electric bulbs A and B are rated as 60 W and 100 W. They are connected in parallel to the same source. Then

Two electric bulbs A and B are rated as 60 W and 100 W. They are connected in parallel to the same source, then